ANSYS

Gear transmissions of various sizes are used in various fields of mechanical engineering, automotive, marine, and aerospace industries according to the needs. This paper presents the modeling and analysis of the modal and harmonic characteristics of a planetary gear transmission for an elbow orthosis. Orthoses are used during the rehabilitation of patients in the postoperative period or during the restoration of lost limb functions. When modeling the planetary gear, the connection elements are made of 45 steel and PLA polylactide.

The rotor is a key element of high-speed mechanisms that are widely used in various industries, such as laboratory centrifuges used to separate mixtures of different fractions, gas turbines, industrial compressors, engines, and others. The main requirement for such mechanisms is reliability and safety during operation. To ensure the above requirements, it is necessary to determine the stress-strain state of the most loaded structural elements of the system and the dynamic characteristics.

The paper presents harmonic analysis for the propagation of a disturbance in a simple compressible elastic structure made of steel (a cubic cube measuring 5×5×5 cm). The impact of initial compression or stretching on the propagation speed of the disorder was assessed. It has been shown that in relation to the reference model, i.e. the model without preliminary interactions, there is a change in the speed of propagation of the disturbance and change of the velocity amplitude.

Presented algorithm automation of graphical dependencies in ANSYS environment using the postprocessor POST1 and POST26.